rockshox suspension calculator

Why use a RockShox suspension calculator?

A proper suspension setup dramatically changes how your bike climbs, corners, brakes, and absorbs impacts. Many riders either run too much pressure (harsh ride, poor traction) or too little (wallowing, bottom-outs, vague handling). This calculator gives you a solid starting point based on rider weight, bike type, and desired ride feel.

Think of it as your baseline setup sheet. Once you have baseline pressure and sag, you can make meaningful one-change-at-a-time adjustments on trail.

How this calculator works

The tool estimates fork and shock pressure from rider system weight (you + pack + water + kit), then adjusts for discipline and ride preference:

• XC: less sag, slightly firmer support for efficiency.
• Trail: balanced support and comfort.
• Enduro / DH: more control under bigger hits and steeper terrain.
• Plush feel: lower pressure and higher sag target.
• Firm feel: higher pressure and lower sag target.

Quick setup process (5-minute version)

1) Set pressure from the calculator

Use a shock pump and match the recommended pressure as closely as possible.

2) Measure sag in riding kit

• Slide the o-ring to the seal.
• Stand neutral on pedals in attack position.
• Dismount carefully and check o-ring displacement.

3) Compare to target sag

If sag is too high, add pressure. If sag is too low, release pressure. Re-check after each adjustment.

4) Dial rebound

Start with the suggested clicks from fully closed (slow), then test: if the bike feels “stuck down,” go faster; if it bucks after impacts, go slower.

Typical sag targets by discipline

Discipline	Fork Sag Target	Rear Sag Target	General Feel
XC / Marathon	18–22%	23–27%	Efficient pedaling, crisp handling
Trail	20–25%	27–30%	Balanced comfort and support
Enduro	23–27%	29–32%	Traction and control on steep terrain
Downhill / Park	25–30%	30–35%	Maximum grip and impact absorption

Common setup mistakes to avoid

• Ignoring riding gear weight: helmet, shoes, water, and pack matter.
• Changing multiple settings at once: adjust one variable, then test.
• Over-focusing on pressure only: rebound and volume tokens/spacers are equally important.
• Testing on the wrong terrain: tune on terrain similar to your normal riding.
• Never re-checking: temperature and service intervals can shift feel over time.

Trail-side tuning checklist

If the fork feels harsh

• Reduce pressure by 2–3 psi.
• Open rebound 1 click faster if it packs down.
• Consider fewer volume spacers if mid-to-end stroke is too stiff.

If the fork dives too much

• Add 2–4 psi.
• Slow rebound by 1 click if it rebounds too quickly.
• Add a volume spacer for better end-stroke support.

If rear shock bottoms frequently

• Add 5–10 psi.
• Increase compression support if available.
• Add a volume spacer/token where compatible.

Final reminder

The best suspension setup is not a single number; it is the setup that matches your trails, speed, and technique. Use this RockShox suspension calculator for your baseline, then tune in small steps over 2–3 rides. Keep notes, and your bike will feel better every week.